/*
 * Copyright (C) 2005 Jimi Xenidis <jimix@watson.ibm.com>, IBM Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 * $Id$
 */

#include <config.h>
#include <hype.h>
#include <cpu.h>
#include <pgalloc.h>
#include <stack.h>

/* create a stack with a specific alignment so we can find the
 * "bottom" (high address) with a simple mask.  This bottom contains
 * the address of the _real_ bottom of the stack after pre amount of
 * data has been set aside. */
uval
stack_new(void)
{
	uval top;
	uval bottom;
	uval sbottom;

	top = get_pages_aligned(&phys_pa, HV_STACK_SIZE, HV_STACK_LOG_SIZE);
	assert(top != INVALID_PHYSICAL_PAGE, "stack allocation failure\n");

	bottom = top + HV_STACK_SIZE;

	/* reserve a page for some CPU/Thread information */
	sbottom = bottom - PGSIZE - MIN_FRAME_SZ;

	return sbottom;
}

	

